Looks like 0 people are going in for ranking, so it's not like US is the only one getting screwed here.
I think it's dumb to limit the marathon field as hard as they do. It's not like all the other track events that have limited space on the racing course and need to share track time with other events. They only do this because they don't want to spend a couple extra thousand per additional athlete and maybe a bit more to expand their starting line.
To alleviate a crowded start, just force starting position by seed time. If you got in by qualifying time, you get to go to the front, then you position by who was fastest. If you got in by ranking or universality, you start a few meters behind them.
Also just noticed they have 81 people qualified on Road to Paris but only 80 spots available per entry rules. So they gladly break the rules for Universality, but can't do it more to let actual competitors in.